Skip to content
DevUtil

Epoch & Unix Timestamp Converter - Convert Dates Online

Current Time
Unix: 
UTC: 

About the Epoch Converter

Unix timestamps are everywhere in software development. Database records, API responses, log files, JWT tokens, and cron schedules all use numeric timestamps to represent dates and times. But a number like 1708012800 does not mean much to the human eye. This converter translates between Unix epoch timestamps and human-readable date-time strings so you can quickly understand when an event occurred or when a token expires.

The tool handles both seconds-based timestamps (10 digits, common in Unix, PHP, and Python) and milliseconds-based timestamps (13 digits, common in JavaScript and Java). It displays results in both UTC and your local timezone.

How to Use the Epoch Converter

To convert a timestamp to a date, paste the numeric value into the timestamp input field. The tool automatically detects whether it is in seconds or milliseconds and displays the corresponding date in both UTC and your local timezone. To convert a date to a timestamp, use the date and time picker to select the moment you need, and the Unix timestamp appears instantly in both seconds and milliseconds formats. Copy whichever format your target system requires.

Features

  • Bidirectional conversion. Convert timestamps to dates and dates to timestamps in the same interface.
  • Auto-detection. The tool recognises whether your input is in seconds or milliseconds.
  • Dual timezone display. See results in both UTC and your local timezone simultaneously.
  • Current time reference. A live display of the current Unix timestamp updates in real time, useful as a quick reference.
  • Client-side only. All calculations run in your browser with no server interaction.

Common Use Cases

Developers use epoch conversion constantly. When an API returns an exp claim in a JWT, you need to know whether the token is still valid. When a log file shows an event at 1708012800, you need to know the actual date. When setting up a cron job or scheduling a task, you need the timestamp for a specific future date. Database administrators comparing records across timezones rely on epoch timestamps to avoid ambiguity. This converter makes all of those tasks instant.

Frequently Asked Questions

What is a Unix epoch timestamp?
A Unix epoch timestamp is the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC (known as the Unix epoch). It is a simple, timezone-independent way to represent a point in time and is widely used in programming, databases, and APIs.
What is the difference between seconds and milliseconds timestamps?
Some systems (like traditional Unix, PHP, and Python) use seconds since the epoch, producing 10-digit numbers. Others (like JavaScript, Java, and many APIs) use milliseconds, producing 13-digit numbers. This tool detects and handles both formats automatically.
How do I convert a date to a Unix timestamp?
Enter a human-readable date and time in the date input field, and the tool will display the corresponding Unix timestamp in both seconds and milliseconds. You can also pick a date from the date picker for convenience.
What timezone does the converter use?
The converter displays dates in both UTC and your local timezone (detected from your browser). This makes it easy to verify that a timestamp represents the moment you expect, regardless of where you are in the world.
What is the Year 2038 problem?
Many older systems store Unix timestamps as 32-bit signed integers, which can only represent dates up to January 19, 2038. After that date, the integer overflows. Modern systems use 64-bit integers, which extend the range to billions of years. This converter uses JavaScript's 64-bit number representation and is not affected by the 2038 limit.